Visual Basic

Re: How can I bind data to Groupbox of radiobuttons

24-Dec-02 22:57

Hi,
Please I need help,

I have a groupbox that contains 2 radiobuttons. So i want to bind to it a datafield (having only 2 values : 1 for the first radiobutton, or 2 for the second radiobutton).

Please can someone show me how to use databinding with this groupbox.

Thank you in advance.

Intibnin...

***

Tatham26-Dec-02 6:31

Re: How can I bind data to Groupbox of radiobuttons

26-Dec-02 6:31

From what I understand in your message, you have:

Form
- GroupBox
- RadioButton1
- RadioButton2

You also have a dataset where each row has 1 column (or more). If this column has a value of 1 you want RadioButton1 to be selected, otherwise RadioButton2.

Can you clarify your situation a bit more? Are you using typed/untyped datasets? Are you using C#, VB, or J#?

I dont see how this isn't just basic databinding - and if it is you'd be better off checking MSDN for the documentation on DataBinding.

Tatham Oddie (VB.NET/C#/ASP.NET/VB6/ASP/JavaScript)
tatham@e-oddie.com
+61 414 275 989

intibnin26-Dec-02 20:45

Re: How can I bind data to Groupbox of radiobuttons

26-Dec-02 20:45

Thank Tatham for help.

Well, the problem i encountred is in VB.NET Form.
I try to clarify the problem, so the dataset used in form is filled programmatically. I create a method for binding fields to dataset as follows :

Private Sub BindingFields()
cn = New SqlClient.SqlConnection(constring)
Dim da As New SqlClient.SqlDataAdapter("select * from parametres where type = 1 order by code ", cn)

'Note : Mydataset, MyBuilder and MyAdapter are declared public objects

Mydataset = New DataSet()
MyAdapter = New SqlClient.SqlDataAdapter("select * from client", cn)
MyBuilder = New SqlClient.SqlCommandBuilder(MyAdapter)
MyAdapter.Fill(Mydataset, "client")

TextBox1.DataBindings.Add(New System.Windows.Forms.Binding("Text", Mydataset, "client.r01_codcli"))
TextBox2.DataBindings.Add(New System.Windows.Forms.Binding("Text", Mydataset, "client.r01_adrcli"))
TextBox3.DataBindings.Add(New System.Windows.Forms.Binding("Text", Mydataset, "client.tel1"))
TextBox4.DataBindings.Add(New System.Windows.Forms.Binding("Text", Mydataset, "client.r01_nomcli"))
TextBox5.DataBindings.Add(New System.Windows.Forms.Binding("Text", Mydataset, "client.tel2"))
TextBox6.DataBindings.Add(New System.Windows.Forms.Binding("Text", Mydataset, "client.fax"))
TextBox7.DataBindings.Add(New System.Windows.Forms.Binding("Text", Mydataset, "client.dat_cre"))
da.Fill(Mydataset, "Categorie")
ComboBox1.DataSource = Mydataset
ComboBox1.DisplayMember = "Categorie.libelle"
ComboBox1.ValueMember = "categorie.cat_cli"

'*****************************
'The problem is here
'Client.stop_serv is 1 or 2
'******************************
GroupBox2.DataBindings.Add(New System.Windows.Forms.Binding("Text", Mydataset, "client.stop_serv"))

End Sub

this code does not work.

Thank you in advance

***

Tatham26-Dec-02 20:55

How Can i detect return key in datagridTextBoxColumn

26-Dec-02 20:55

Either:

RadioButton1.DataBindings.Add(New System.Windows.Forms.Binding("Value", Mydataset, "client.stop_serv1"))<br />
<br />
RadioButton2.DataBindings.Add(New System.Windows.Forms.Binding("Value", Mydataset, "client.stop_serv2"))

Or, can you just use a check box and bind the Checked property?

Tatham Oddie (VB.NET/C#/ASP.NET/VB6/ASP/JavaScript)
tatham@e-oddie.com
+61 414 275 989

intibnin24-Dec-02 22:49

Re: How Can i detect return key in datagridTextBoxColumn

24-Dec-02 22:49

Hi,
Please I need help.
I created a form that allows me searching customers by name. after display customers list in datagrid, i want allow user to select one customer by pressing key.
for grid setup, i tried the following code :

'Configuration de la grille
Private Sub DataGridSetup()
Dim ts As New DataGridTableStyle()
Dim cs As New DataGridTextBoxColumn()
AddHandler cs.TextBox.KeyPress, AddressOf CellKeyPress
DataGrid1.ContextMenu = ContextMenu1
DataGrid1.CaptionText = "Résultat"
ts.MappingName = "mycli"
cs.MappingName = "c_cli"
cs.HeaderText = "Code"
cs.Alignment = HorizontalAlignment.Center
ts.GridColumnStyles.Add(cs)
cs = New DataGridTextBoxColumn()
cs.MappingName = "N_cli"
cs.HeaderText = "Nom/Raison sociale"
ts.GridColumnStyles.Add(cs)
DataGrid1.TableStyles.Clear()
DataGrid1.TableStyles.Add(ts)
End Sub

and i added handler to datagridtextboxcolumn, for detecting the keypress events as follows :

'Ajout d'un évènement aux cellules
Public Sub CellKeyPress(ByVal Sender As Object, ByVal e As KeyPressEventArgs)
Dim dt As DataTable = ds.Tables("mycli")
Dim p As Integer
CodeClient = Space(11)
If e.KeyChar = Chr(13) Then
p = Me.BindingContext(ds, "mycli").Position
CodeClient = dt.Rows(p)("c_cli")
Me.Close()
End If

End Sub

So after writing this code, i can select one customer only after pressing SHIFT+RETURN.

please can you explain me way i must first press
SHIFT.

Thank you very match.

Intibnin...

***

Tatham26-Dec-02 6:44

Re: How Can i detect return key in datagridTextBoxColumn

26-Dec-02 6:44

The return key is captured to end edits. If you begin editing a DataGridTextBoxColumn and then press enter the edit will end.

If you want to override this you'll have to be really careful or edits or use the column as read-only.

The easiest (maybe only) way to do this would be to creat your own wrapper which inherits the DataGridTextBoxColumn class. Eg:

Public Class DataGridTextBoxSelectorColumn<br />
    Inherits DataGridTextBoxColumn<br />
<br />
    Public ...<br />
End Class

From here you should be able to override the key events. Be careful that if your not going to actually do anything on the event that you call the equivalent MyBase.whatever event.

Tatham Oddie (VB.NET/C#/ASP.NET/VB6/ASP/JavaScript)
tatham@e-oddie.com
+61 414 275 989

intibnin30-Dec-02 4:55

Re: How Can i detect return key in datagridTextBoxColumn

30-Dec-02 4:55

Hi Tatham,

Thank you for your help.

I tried your code bu it doesn't work.

if you can clarify more.

I attract your attention that the return key is completely omitted in the datagrid and all the other keys work correctly. Probably because <enter> key appears in the list of keyboard shortcut of the datagrid control

thank you for advance.
intibnin
***

Tatham30-Dec-02 5:03

30-Dec-02 5:03

Sorry, I cant really help much more. I dont have any other ideas.

Tatham Oddie (VB.NET/C#/ASP.NET/VB6/ASP/JavaScript)
tatham@e-oddie.com
+61 414 275 989

toolbar_button click

Anonymous24-Dec-02 10:30

24-Dec-02 10:30

Uh, I am sorta new at this toolbar thing. Can someone give me the syntax of how to make the toolbar buttons do something? It has to do with toolbar_buttonclick () I am pretty sure. Please help

Re: toolbar_button click

Nick Seng25-Dec-02 15:48

LabelArray and MenuItemArray

25-Dec-02 15:48

If it is VB6...

When you set the properties for your toolbar, you have to set the key for each button, for example, "IDX_NEW","IDX_OPEN", etc.

Then

<br />
Private Sub toolbar_ButtonClick(ByVal Button as MSComctlLib.Button)<br />
Select Case Button.Key<br />
   Case "IDX_NEW"<br />
      coding<br />
   Case "IDX_OPEN"<br />
      coding<br />
........<br />
<br />

Notorious SMC

The difference between the almost-right word & the right word is a really large matter - it's the difference between the lightning bug and the Lightning
Mark Twain

Get your facts first, and then you can distort them as much as you please
Mark Twain

Ilan Ehrenfeld23-Dec-02 23:34

Ilan Ehrenfeld

23-Dec-02 23:34

hi
my name is rachel and I need help.
I don't know how to use the controls:LabelArray and MenuItemArray
Confused | :confused:

Re: LabelArray and MenuItemArray

Nick Seng25-Dec-02 15:40

Launching executable file

25-Dec-02 15:40

Both these object are from the vb6.compatibility namespace and are used to represent control array when upgrading a project from vb6 to .net. Microsoft does not recommend the use of these objects for new .net projects sinse they will not support it in later versions. However, if you still want to use them...

First add the controls to the form, say lblArray,lbl_0,lbl_1,lbl_2

then

<br />
Public Sub Form_Load()<br />
    lblArray.SetIndex(lbl_0,Ctype(0,Short)<br />
    lblArray.SetIndex(lbl_1,Ctype(1,Short)<br />
    lblArray.SetIndex(lbl_2,Ctype(2,Short)<br />
End Sub<br />

You can then reference these controls as lblArray(i), where i = 0,1,2

though IMHO, it's better than you not use them. Instead just declare an array of labels and assign each control to it

Notorious SMC

Desmond23-Dec-02 7:42

Desmond

23-Dec-02 7:42

Dear All,

I am having difficulty in running the following code: -

Basically, i am writing this code in Window XP and it run well. But, when i changed to
Window 98, it run the notepad.exe, but also pup-up the message box. May i know what is the problem here. The followings are the exact code that i used in XP and 98.
Thank in advance. Merry Xmas n happy new year...

Dim x As Integer

Private Sub Form_Load()
On Error GoTo Err
x = Shell("Notepad.exe", vbHide)
Unload Me
Exit Sub

Err:
MsgBox "File Not Found", vbCritical
Unload Me
End Sub

Re: Launching executable file

Ray Cassick23-Dec-02 9:29

Ray Cassick

23-Dec-02 9:29

in the error handler take a look at the error message and error number to give an indication as to why your handler is being called.

Paul Watson wrote:
"At the end of the day it is what you produce that counts, not how many doctorates you have on the wall."

George Carlin wrote:
"Don't sweat the petty things, and don't pet the sweaty things."

How to pass a ADO object as a parameter to a function?

Anonymous22-Dec-02 17:25

Re: How to pass a ADO object as a parameter to a function?

22-Dec-02 17:25

I defined a function like this:
func(byref x as ADODB.Connection)
then i :
Dim conn as New ADODB.Connection
afterwards i:
func(conn)

but when i compiled it, i met a error. How to write correctly?thanks much Dead | X|

Nick Seng22-Dec-02 17:57

Re: How to pass a ADO object as a parameter to a function?

22-Dec-02 17:57

What does the error say? what about the error code?

Notorious SMC

Anonymous22-Dec-02 18:40

Re: How to pass a ADO object as a parameter to a function?

22-Dec-02 18:40

type mismatch Frown | :(

Nick Seng22-Dec-02 20:01

Re: How to pass a ADO object as a parameter to a function?

22-Dec-02 20:01

Try this:-

<br />
call func(conn)<br />

<br />
func conn<br />

Notorious SMC

Anonymous22-Dec-02 20:41

Re: How to pass a ADO object as a parameter to a function?

22-Dec-02 20:41

thanks,i solved the type mismatch by your advice. Laugh | :laugh:

Ray Cassick23-Dec-02 7:02

Ray Cassick

23-Dec-02 7:02

But do you understand WHY this worked? I think that is more important.

Using parens in VB mandates that your function RETURN something.

For example:

Public Function AddNumbers(numOne As Integer, numTwo As Integer) As Ineteger

   Dim retVal as Integer

   retVal = numOne + numTwo

   AddNumbers = retVal

End Function

This function would be called like so:

Dim answer As Integer

answer = AddNumbers(1, 2)

If you have a Subroutine they generally don't return anything. This is afterall the main difference between a Function and a Subroutine. Functions do soemthing AND return something.

Given a Subroutine as such:

Public Sub DisplaySomething(something As String)
   Debug.Print something
End Sub

Because this does not return anything it has to be called one of the following ways:

DisplaySomething "Hello World."

-or-

Call DisplaySomething("Hello World.")

This is one of the reasons that alot of people don't like VB. They feel confused by needing to rememebr if they have to use parens or not.

Generally speaking i think that using the Call keyword is bad form though. Simply don't use parens and all is fine.

Re: How to pass a ADO object as a parameter to a function?

Nick Seng25-Dec-02 14:48